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/*
* BK Id: SCCS/s.syscalls.c 1.11 10/16/01 15:58:42 trini
*/
/*
* linux/arch/ppc/kernel/sys_ppc.c
*
* PowerPC version
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* Derived from "arch/i386/kernel/sys_i386.c"
* Adapted from the i386 version by Gary Thomas
* Modified by Cort Dougan (cort@cs.nmt.edu)
* and Paul Mackerras (paulus@cs.anu.edu.au).
*
* This file contains various random system calls that
* have a non-standard calling sequence on the Linux/PPC
* platform.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/stat.h>
#include <linux/mman.h>
#include <linux/sys.h>
#include <linux/ipc.h>
#include <linux/utsname.h>
#include <linux/file.h>
#include <asm/uaccess.h>
#include <asm/ipc.h>
#include <asm/semaphore.h>
void
check_bugs(void)
{
}
int sys_ioperm(unsigned long from, unsigned long num, int on)
{
printk(KERN_ERR "sys_ioperm()\n");
return -EIO;
}
int sys_iopl(int a1, int a2, int a3, int a4)
{
printk(KERN_ERR "sys_iopl(%x, %x, %x, %x)!\n", a1, a2, a3, a4);
return (-ENOSYS);
}
int sys_vm86(int a1, int a2, int a3, int a4)
{
printk(KERN_ERR "sys_vm86(%x, %x, %x, %x)!\n", a1, a2, a3, a4);
return (-ENOSYS);
}
int sys_modify_ldt(int a1, int a2, int a3, int a4)
{
printk(KERN_ERR "sys_modify_ldt(%x, %x, %x, %x)!\n", a1, a2, a3, a4);
return (-ENOSYS);
}
/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
*
* This is really horribly ugly.
*/
int
sys_ipc (uint call, int first, int second, int third, void *ptr, long fifth)
{
int version, ret;
version = call >> 16; /* hack for backward compatibility */
call &= 0xffff;
ret = -EINVAL;
switch (call) {
case SEMOP:
ret = sys_semop (first, (struct sembuf *)ptr, second);
break;
case SEMGET:
ret = sys_semget (first, second, third);
break;
case SEMCTL: {
union semun fourth;
if (!ptr)
break;
if ((ret = verify_area (VERIFY_READ, ptr, sizeof(long)))
|| (ret = get_user(fourth.__pad, (void **)ptr)))
break;
ret = sys_semctl (first, second, third, fourth);
break;
}
case MSGSND:
ret = sys_msgsnd (first, (struct msgbuf *) ptr, second, third);
break;
case MSGRCV:
switch (version) {
case 0: {
struct ipc_kludge tmp;
if (!ptr)
break;
if ((ret = verify_area (VERIFY_READ, ptr, sizeof(tmp)))
|| (ret = copy_from_user(&tmp,
(struct ipc_kludge *) ptr,
sizeof (tmp))))
break;
ret = sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp,
third);
break;
}
default:
ret = sys_msgrcv (first, (struct msgbuf *) ptr,
second, fifth, third);
break;
}
break;
case MSGGET:
ret = sys_msgget ((key_t) first, second);
break;
case MSGCTL:
ret = sys_msgctl (first, second, (struct msqid_ds *) ptr);
break;
case SHMAT:
switch (version) {
default: {
ulong raddr;
if ((ret = verify_area(VERIFY_WRITE, (ulong*) third,
sizeof(ulong))))
break;
ret = sys_shmat (first, (char *) ptr, second, &raddr);
if (ret)
break;
ret = put_user (raddr, (ulong *) third);
break;
}
case 1: /* iBCS2 emulator entry point */
if (!segment_eq(get_fs(), get_ds()))
break;
ret = sys_shmat (first, (char *) ptr, second,
(ulong *) third);
break;
}
break;
case SHMDT:
ret = sys_shmdt ((char *)ptr);
break;
case SHMGET:
ret = sys_shmget (first, second, third);
break;
case SHMCTL:
ret = sys_shmctl (first, second, (struct shmid_ds *) ptr);
break;
}
return ret;
}
/*
* sys_pipe() is the normal C calling standard for creating
* a pipe. It's not the way unix traditionally does this, though.
*/
int sys_pipe(int *fildes)
{
int fd[2];
int error;
error = do_pipe(fd);
if (!error) {
if (copy_to_user(fildes, fd, 2*sizeof(int)))
error = -EFAULT;
}
return error;
}
static inline unsigned long
do_mmap2(unsigned long addr, size_t len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)
{
struct file * file = NULL;
int ret = -EBADF;
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
if (!(flags & MAP_ANONYMOUS)) {
if (!(file = fget(fd)))
goto out;
}
down_write(¤t->mm->mmap_sem);
ret = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(¤t->mm->mmap_sem);
if (file)
fput(file);
out:
return ret;
}
unsigned long sys_mmap2(unsigned long addr, size_t len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff)
{
return do_mmap2(addr, len, prot, flags, fd, pgoff);
}
unsigned long sys_mmap(unsigned long addr, size_t len,
unsigned long prot, unsigned long flags,
unsigned long fd, off_t offset)
{
int err = -EINVAL;
if (offset & ~PAGE_MASK)
goto out;
err = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
out:
return err;
}
extern int sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
/*
* Due to some executables calling the wrong select we sometimes
* get wrong args. This determines how the args are being passed
* (a single ptr to them all args passed) then calls
* sys_select() with the appropriate args. -- Cort
*/
int
ppc_select(int n, fd_set *inp, fd_set *outp, fd_set *exp, struct timeval *tvp)
{
if ( (unsigned long)n >= 4096 )
{
unsigned long *buffer = (unsigned long *)n;
if (verify_area(VERIFY_READ, buffer, 5*sizeof(unsigned long))
|| __get_user(n, buffer)
|| __get_user(inp, ((fd_set **)(buffer+1)))
|| __get_user(outp, ((fd_set **)(buffer+2)))
|| __get_user(exp, ((fd_set **)(buffer+3)))
|| __get_user(tvp, ((struct timeval **)(buffer+4))))
return -EFAULT;
}
return sys_select(n, inp, outp, exp, tvp);
}
int sys_pause(void)
{
current->state = TASK_INTERRUPTIBLE;
schedule();
return -ERESTARTNOHAND;
}
int sys_uname(struct old_utsname * name)
{
int err = -EFAULT;
down_read(&uts_sem);
if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
err = 0;
up_read(&uts_sem);
return err;
}
int sys_olduname(struct oldold_utsname * name)
{
int error;
if (!name)
return -EFAULT;
if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
return -EFAULT;
down_read(&uts_sem);
error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
error -= __put_user(0,name->release+__OLD_UTS_LEN);
error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
error -= __put_user(0,name->version+__OLD_UTS_LEN);
error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
error = __put_user(0,name->machine+__OLD_UTS_LEN);
up_read(&uts_sem);
error = error ? -EFAULT : 0;
return error;
}
#ifndef CONFIG_PCI
/*
* Those are normally defined in arch/ppc/kernel/pci.c. But when CONFIG_PCI is
* not defined, this file is not linked at all, so here are the "empty" versions
*/
int sys_pciconfig_read(void) { return -ENOSYS; }
int sys_pciconfig_write(void) { return -ENOSYS; }
long sys_pciconfig_iobase(void) { return -ENOSYS; }
#endif
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